To help combat the problem, Childline is launching a new campaign - Listen To Your Selfie - aimed at helping young people recognise the signs of grooming and unhealthy relationships (stock image shown) (Image: 2014 Photothek)

More than 150 Scottish children called Childline worried about online sexual abuse last year and helpline organisers believe the true figure could be much higher.

Childline workers held 151 counselling sessions relating to online sexual abuse with young people who said they were calling from Scotland but the caller's country of origin was not recorded in 890 of the 3,716 calls on the issue across the UK last year.

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Nationwide, the number of calls from children concerned about online sexual abuse rose by 24 per cent in the last year, with one in eight callers (459) specifically concerned about grooming, a 21 per cent increase.

Charity NSPCC, which runs the helpline, believes the growing use of apps and webcams is leading to more children becoming potential victims of grooming for sex and warns online chats can be a "playground for paedophiles".

To help combat the problem, Childline is launching a new campaign - Listen To Your Selfie - aimed at helping young people recognise the signs of grooming and unhealthy relationships, both online and offline.

The campaign, funded by BBC Children in Need, features two films where selfies come to life and question a situation.

The Game focuses on a same-sex online grooming scenario and The Party highlights peer-to-peer sexual pressure and grooming.

Matt Forde, NSPCC Scotland national head of service, said: "Most of us talk to people online and it's a great way to stay connected and make new friends.